9=n2/9

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Solution for 9=n2/9 equation: 


n in (-oo:+oo)

9 = (n^2)/9 // - (n^2)/9

9-((n^2)/9) = 0

-1/9*n^2 = -9 // : -1/9

n^2 = 81

n^2 = 81 // ^ 1/2

abs(n) = 9

n = 9 or n = -9

n in { 9, -9 }

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